Bucket construction.



H. J. DESSON.

BUCKET CONSTRUCTION. h APPLJCATION FILED DEC. 91 \9 16.

Patented Apr. 16, 1918.

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H. J. DESSON.

BUCKET CONSTRUCTION.

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BUCKET CONSTRUCTlON. APPLICATION FILED' mac. 9. 1916.

1,262,928. Patented Apr,-16', 1918.

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HERBERT J. DESSON, or PITTSBURGH, PENNSYLVANIA, AssroNon To BLAW STEEL CONSTRUCTION COMPANY, a oonronArroN on NEW JERSEY.

BUCKET CONSTRUCTION.

Specification of Letters Patent. Pattcentfid Apr. 16, 1918.

Application filed December 9, 1916. Serial N 0. 135,938.

To all whom it may concern:

Be it known that I, HERBERT-J. DnssoN, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Bucket Constructions, of which the following is a specification.

The invention relates to bucket constructions of the clam shell type, and particularly to the pulley construction for closing the jaws of the bucket. The invention has for its primary objects; the provision of an unproved means for supportlng the pulley wheels or sheaves carried by the hinge brackets of the bucket; the provision of a pulley support having great rigidity and strength and adapted to act as a brace between the two sets of hinge brackets; the provision of a pulley support in which the parts can be readily assembled and disassembled without disturbing the other parts of the bucket; and the provision of a simple compact arrangement, wherein the pulley wheels may be removed and replaced without knocking down the bucket or unreeving the pulley rope or cable. One embodiment of the invention is illustrated in the accompanying drawings, wherein- Figures 1 and 2 are side and front elevation views, respectively, of the assembled apparatus; Figs. 3 and 4 are end and front elevations, respectively, of the brace or truss employed in the construction; and Figs. 5 and 6 are plan and side elevation views, re spectively, of the pulley wheel or sheave cage.

Referring to Figs. 1 and 2, the reference numerals l and 2 indicate the opposing jaws of the bucket; 3 and 4 are the hinge brackets secured to the ends of the jaws; 5 and 6 are the operating rods pivoted at their lower ends to the jaws and at their upper ends to the block 7 to which the supporting cable 8 is attached; 9 is the brace or truss extending between the two sets of hinge brackets; 10 is the cage for the pulley wheels mounted in a recess in the truss 9; 11 are the pulley wheels mounted in the cage 10; 12 is a pulley block carried by the block 7; and 13 is the operating rope or cable which is reeved through the pulley wheels in the cage 10 and the block 12.

The brace or truss member 9 shown in detail in Figs. 3 and 4 comprises central bosses 14 provided with pivot openings 15, stiffen-- below by extensions 20 and 21, such members constituting continuations of the ribs 16 and 17.

The pulley cage is constructed as shown in Figs. 5 and 6 and comprises side plates 22 stittened by ribs 23 and connected at their lower portions by the curved portion 24. The side plates are also provided with the pivot recesses 25.

Tn assembling the cage, pulleys, and truss, the pulleys are first placed in the cage 10 and a pivot pin 10 (Fig. 2) is inserted through the openings 25 and the openings through the pulleys, such pivot pin terminating flush with the outside surface of the cage. The pivot pin is provided with a small pin adapted to fit the keyway shown in Fig. 6 to prevent the rotation of the pivot pin. The cage is then inserted in the chamber or recess 19 of the truss 9 and the bolts 26 (Figs. 1 and2) are inserted through the openings 27 and 28 in the cage and truss (Figs. 3 and 6). The truss is now ready to be assembled with respect to the rest of the bucket structure.

The hinge brackets 3 and 4 are provided at their ends with the journal castings 29 and 30 (Fig. 2) secured to the ends of such brackets and are pivoted upon the pins 31. These pins extend through the journal members 29 and 30 into the ends of the truss 9, the truss in this manner being pivotally upported upon the same pins which constitute the pintles of the hinge brackets. The pins 31 are held against outward movement by small pins 32 extending through the bosses of the truss member 9 and into the pivot pins. The outer hinge members 29 are held against movement away from the other hinge members 30 by means of collars 33 secured to the outer ends of the pivot rods 31 by means of the pins or cotters 34. The holding bolts 26 are preferably provided with idlers 35 adapted to engage the various turns of the cable 13 so that the cable itself serves to maintain the truss 9 in the position shown in Figs. 1 and 2, its tilting movement about the pivot pins 31 being limited by the engagement of the idlers 35 by the cable.

The truss 9 serves as a brace between the two sets of hinge brackets and also serves as a secure support for the pulley cage 10. The truss form makes the brace 9 rigid and permits of the chamber or recess for the reception of the pulley cage. In case it becomes necessary to replace one of the pulleys 11 in the pulley cage such operation is easily accomplished and without disturbing the main parts of the bucket, since all that is necessary is the removal of the pulley cage after which the pivot on which the pulleys are mounted can be removed and the pulleys themselves taken out and replaced. This operation can be carried out without unreev ing the rope or cable 13 so that the time and efiort involved in repairing or replacing the pulleys is slight. Other advantages incident to the compactness and simplicity of the arrangement will be readily apparent to those skilled in the art.

What I claim is:

l. Incombination in a clam shell bucket, a pair of jaws, hinge brackets on each side of the jaws pivoted together, a brace extending between the two sets of hinge brackets and provided withacentral recess, a pulley cage releasably secured in the recess and pulley wheels removably mounted in the cage, the said brace being provided with bridge por' 'ons extending across the said recess above and below said pulley cage.

2. In combination in a clam shell bucket, a pair of jaws, hinge brackets on each side of the jaws pivoted together, a brace extending between the two sets of hinge brackets and comprising a pair of tapering end members provided with opposing end plates at buggies of this patent may be obtained for a truss extending between the two sets of hinge brackets with its central portion cut out and with. bridge portions extending across the central portion at the upper and lower extremities, a pulley cage in the cut out portion, means for releasably securing the cage to the truss, and pulley wheels removably mounted in the cage.

l. In combination in a clam shell bucket, a pair of jaws, hinge brackets on each side of the jaws pivoted together, a brace extending between the two sets of hinge brackets and comprising a pair of end members provided with op osing end plates at right angles to the axis of the brace and a pair of bridge members connecting the upper and lower portions of said end members, a pulley cage mounted in the recess between the end plates and bridge members and provided with securing extensions, releasable securing means extending through said extensions and the end plates, an axle mounted removably in the cage, and pulley wheels mounted on the axle.

HERBERT J. DESSON.

five cents each, by addressing the @ommisstoner of Patents:

Washington, D. G. 

